On Tue, Oct 25, 2005 at 01:35:55PM -0400, Lamar Owen wrote: > > >>> On Tue, Oct 25, 2005 at 12:16:09AM -0400, Lamar Owen wrote: > >> With a decimation rate of 8 and a DDC center frequency at 10.7MHz, I see > >> better than -10dB at the band edge now, which is a greater than 20dB > >> improvement in flatness. Very nice. > > > Attached are some captures of plots made with a slightly customized > > usrp_fft.py (and older version, too; not sure if that impacts the curve > > shapes). > > To answer my own point, yes, the older code did impact the shape. Using > the latest CVS usrp_fft.py as a base instead of the version I used. Using > the newer, I get consistent shapes; although, none are quite as flat as > the decim32 example before... :-)
Hmmm, I just ran some experiments looks using a TV_RX pointed at a pretty dead spot on the band (403M). Everything looks good with the exception of the decim = 10 case. Using the checked in usrp_fft.py are you still getting the "swoopy" looking signals, or does it look pretty flat for all but dec = 10? Eric _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
